langchain-core

langchain-ai/langchain

Core Python package in the LangChain ecosystemready

langchain-core is the core package that provides LangChain's common abstractions and fundamental execution components, serving as the foundation for developing LLM applications and agents. Since both developers using LangChain itself and those maintaining higher-level packages and integration libraries depend on this package, its releases directly impact API compatibility and overall ecosystem stability.

langchainlangchain-corepythonllmagentsframework

Choose version

1.7.61w ago

langchain-core langchain-core==1.7.6

Original

Key point

langchain-core 1.7.6 significantly improves performance by optimizing streaming message merging and partial JSON parsing logic.

Details

Performance improvement: Optimized the merging of streamed messages to occur only once when accumulating AIMessageChunk into mutable runnable streams, increasing processing efficiency.
Performance improvement: Improved parsing performance by removing the inefficient behavior of the parse_partial_json function that retried character by character.

langchain-core releases | AI Briefing